Safety cover

ABSTRACT

A safety cover comprises an inner plug and an outer cover. The coupling portions of the inner plug and outer cover are alternatively arranged with stopper and ribs. The inner surfaces of the limiting stoppers coupling to the ribs are inclined. When the ribs of the inner plug are separated from the limiting stoppers of the outer cover, the inner plug dose not rotate with the rotation of the outer cover. When the user presses the outer cover slightly, so that the buckle ring of the outer cover is embedded into the annular flange of the inner plug, the stopper ribs of the outer cover exactly slide along the limiting stoppers of the inclined surface of the inner plug to buckle the limiting stoppers. Thereby, the stopper ribs of the outer cover resist against the limiting stoppers of the inner plug to rotate therewith.

BACKGROUND OF THE INVENTION

[0001] The present invention related to safety covers, and particularly to a safety cover wherein the coupling portions of the inner plug and outer cover are alternatively arranged with stoppers and ribs. The inner surfaces of the limiting stoppers coupling to the ribs are inclined. When the ribs of the inner plug are separated from the limiting stoppers of the outer cover; the inner plug dose not rotate with the rotation of the outer cover; when the user presses the outer cover slightly, so that the buckle ring of the outer cover is embedded into the annular flange of the inner plug, the stopper ribs of the outer cover exactly slide along the limiting stoppers of the inclined surface of the inner plug to buckle the limiting stoppers; thereby, the stopper ribs of the outer cover resists against the limiting stoppers of the inner plug to rotate therewith.

[0002] In the prior art, the outer cover and inner plug are formed with threaded surfaces. Before locking the threaded surfaces, a press space is left for preventing the inner plug from rotation as the outer cover rotates. Thereby, a safety cover is formed. However, the no buckle structure is formed. The coupling of the inner plug and outer cover must be achieved by slightly adjusting the outer cover.

SUMMARY OF THE INVENTION

[0003] Accordingly the primary object of the present invention is to provide a safety cover which comprises an inner plug and an outer cover locked to a periphery of the inner plug. The inner plug has a plurality of ribs. A top surface of the inner plug has an annular groove. The annular groove is installed with a buckle portion. The outer cover has an annular flange buckled with a buckling ring of the inner plug. The outer cover has a configuration corresponding to the ribs of the inner plug. A plurality of limiting stoppers are arranged around a whole inner surface of the outer cover. Each of an inner surface of each limiting stopper coupled to a respective rib of the inner plug is an inclined surface. A portion of the outer cover corresponding to the buckle portion of the inner plug is installed with a protruding annular ring for confining the buckled portion. When the ribs of the inner plug are separated from the limiting stoppers of the outer cover; the inner plug dose not rotate with the rotation of the outer cover; when the user presses the outer cover slightly, so that the buckle ring of the outer cover is embedded into the annular flange of the inner plug, the stopper ribs of the outer cover exactly slides along the limiting stoppers of the inclined surface of the inner plug to buckle the limiting stoppers; thereby, the stopper ribs of the outer cover resists against the limiting stoppers of the inner plug to rotate therewith.

[0004] The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing.

BRIEF DESCRIPTION OF THE DRAWINGS

[0005]FIG. 1 is an exploded perspective view of the present invention.

[0006]FIG. 2 is an assembled cross section view of the present invention.

[0007]FIG. 3 is a plane cross section view showing that in the present invention, where the inner plug and outer cover are separated.

[0008]FIG. 4 is a plane cross section view showing that the inner plug is buckled to the outer cover.

[0009]FIG. 5 is a plane cross section view showing the separation state in another embodiment of the present invention.

[0010]FIG. 6 is a plane cross section view showing the buckling state in another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0011] With reference to FIG. 1, the structure of the present invention is clearly shown. The present invention mainly includes an inner plug 1 and an outer cover 2 locked to a periphery of the inner plug 1.

[0012] An inner surface of the inner plug 1 is formed with a threaded surface 11 which can be exactly locked to an opening of a can. An annular surface of the inner plug 1 is protruded with a buckling ring 12 which is engagable with the outer cover 2. A portion of the inner plug 1 resisting against the outer cover 2 has a plurality of ribs 13 which are arranged around a circle. A top surface of the inner plug 1 has an annular groove 14. A center of the annular groove 14 is installed with a buckle portion 15 which can be inserted into an inner top groove of the outer cover 2.

[0013] The outer cover 2 has an annular flange 21 buckled with the buckling ring 12 of the inner plug 1. A portion at a top inner surface of the outer cover 2 has a configuration corresponding to the ribs 13 of the inner plug 1. A plurality of limiting stoppers 22 are arranged around the whole inner surface of the outer cover 2. The inner surfaces of the limiting stoppers 22 coupled to the ribs 13 of the inner plug 1 are inclined surfaces 221. The portion of the outer cover 2 corresponding to the buckle portion 15 of the inner plug 1 is installed with a protruding annular ring 23 for confining the buckled portion 15.

[0014] The assembly of the present invention is illustrated in FIG. 4. The limiting stoppers 23 are the top inner surface of the outer cover 2 and the inner plug 1 is engaged to the annular ring 23 of the outer cover 2. The buckling portion 15 of the inner plug 1 exactly resists against the annular ring 23 of the outer cover 2.

[0015] Thereby, in general, the buckling portion 15 of the inner plug 1 is exactly buckled to the annular ring 23 of the outer cover 2. The ribs 13 of the inner plug 1 are separated from the limiting stoppers 22 of the outer cover 2 so that the inner plug 1 can not rotate with the rotation of the outer cover 2 (referring to FIG. 3).

[0016] When it is desired to rotate the outer cover 2 to be out of the inner plug 1, the user only needs to press the outer cover 2 downwards so that the buckle portion 15 of the inner plug 1 is exactly embedded into the annular ring 23 of the outer cover 2. Further, the ribs 13 of the inner plug 1 slide downwards along the limiting stoppers 22 of the inclined surface 221 of the outer cover 2 to be buckled to the limiting stopper 22. Thereby, the limiting stopper 22 of the outer cover 2 resists against the rib 13 of the inner plug 1 to drive the inner plug 1 to rotate at the same time (referring to FIG. 4). After the outer cover 2 is tightened, the user applies a slight force to lift the outer cover 2 so that the limiting stopper 22 of the outer cover 2 separates from the rib 13 of the inner plug 1. Thereby, a safety cover is formed.

[0017] With reference to FIG. 6, another embodiment of the present invention is illustrated. A top inner surface of the outer cover 2 is aligned to the limiting stopper 22 of the inner plug 1 has an annular stopping rib 24. An inner surface of the outer cover 2 has an annular groove 25. A center of the annular groove 25 is concave so as to form a buckle ring 26.

[0018] The inner plug 1 has an annular limiting stoppers 16 which are arranged along a circle. An inner surface of each limiting stopper 16 is formed as an inclined surface 161. The buckle ring 26 of the inner plug 1 coupled to the outer cover 2 is installed with an annular flange 17 for receiving the buckle ring 26.

[0019] Thereby, generally, the buckling ring 26 of the outer cover 2 is exactly buckled to the annular flange 17 of the inner plug 1 so that when the stopping rib 24 of the outer cover 2 is separated from the limiting stoppers 16 of the inner plug 1, the inner plug 1 can not rotate with the rotation of the outer cover 2 (referring to FIG. 5).

[0020] When the user presses the outer cover 2 slightly, so that the buckle ring 26 of the outer cover 2 is embedded into the annular flange 17 of the inner plug 1, the stopper ribs 24 of the outer cover 2 exactly slide along the limiting stoppers 16 of the inclined surface 161 of the inner plug 1 to buckle the limiting stoppers 16. Thereby, the stopper ribs 24 of the outer cover 2 resist against the limiting stoppers 16 of the inner plug 1 to rotate therewith (referring to FIG. 6).

[0021] Although the present invention has been described with reference to the preferred embodiments, it will be understood that the invention is not limited to the details described thereof. Various substitutions and modifications have been suggested in the foregoing description, and others will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims. 

What is claimed is:
 1. A safety cover comprising an inner plug and an outer cover locked to a periphery of the inner plug; wherein a portion of the inner plug resisting against the outer cover having a plurality of ribs which are arranged around a circle; a top surface of the inner plug has an annular groove; a center of the annular groove is installed with a buckle portion which is inserted into an inner top groove of the outer cover; the outer cover has an annular flange buckled with a buckling ring of the inner plug; a portion at a top inner surface of the outer cover has a configuration corresponding to the ribs of the inner plug; a plurality of limiting stoppers are arranged around a whole inner surface of the outer cover; each of an inner surface of each limiting stopper coupled to a respective rib of the inner plug is an inclined surface; a portion of the outer cover corresponding to the buckle portion of the inner plug is installed with a protruding annular ring for confining the buckled portion; wherein, when the ribs of the inner plug are separated from the limiting stoppers of the outer cover, the inner plug dose not rotate with the rotation of the outer cover; when the user presses the outer cover slightly, so that the buckle ring of the outer cover is embedded into the annular flange of the inner plug, the stopper ribs of the outer cover exactly slide along the limiting stoppers of the inclined surface of the inner plug to buckle the limiting stoppers; thereby, the stopper ribs of the outer cover resist against the limiting stoppers of the inner plug to rotate therewith.
 2. The safety cover as claim in claim 1, wherein an annular surface of the inner plug is protruded with a buckling ring which is engagable with the outer cover.
 3. The safety cover as claim in claim 1, wherein a top inner surface of the outer cover aligned to the limiting stopper of the inner plug has an annular stopping rib; an inner surface of the outer cover has an annular groove; a center of the annular groove is concave so as to form a buckle ring; the inner plug has an annular limiting stoppers which are arranged along a circle; an inner surface of each limiting stopper is formed as an inclined surface; the buckle ring of the inner plug coupled to the outer cover is installed with an annular flange for receiving the buckle ring. 